Home / 78,555.12-108,407.18-42,745.16

Finding the Fourth Proportional to 78,555.12, 108,407.18 and 42,745.16

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Solution

The fourth proportional to 78,555.12, 108,407.18 and 42,745.16 is: 58,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,555.12 : 108,407.18 = 42,745.16 : x
  2. Step 2: Convert to fraction form
    78,555.12/108,407.18 = 42,745.16/x
  3. Step 3: Cross multiply
    78,555.12x = 108,407.18 × 42,745.16
  4. Step 4: Simplify right side
    78,555.12x = 4,633,882,254.25
  5. Step 5: Solve for x
    x = 4,633,882,254.25/78,555.12
  6. Step 6: Final answer
    x = 58,988.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.